Lamp



Aug.. .25, 193K., E. MCCUNTOCK A LZQZ? LAMP Filed July 15. 1928 v im m 31a/vento@ gng- @Rennens Patented Aug. 25, 1931 UNITED STATES PATEen*` OFFICE Application med July 13, 1928. Serial No. 292,586.

' My invention relates to electric lamps and has for its object to provide a lamp employ.- ing a tube filled with certain gas or gases and terminating in electrodes, and in further impressing a relatively high voltage across said electrodes to cause the gas or gases within said tube to become illuminated.

Another object of the invention resides in providing a globe having a neck and formed o with a partition and in integrally connecting said tube to said partition in such a manner as to permit having relatively different gas copstituents on the inside and outside of the tu e.

A further object of the invention resides in connecting to said neck a cylindrical base and in housing within said base a transformer adapted to have its high tension terminals connected to the electrodes of said tube.

A feature of the invention resides in attaching to said base an electrical plug and in connecting the low tension terminals of said transformer to said plug.

A still further object of the invention resides in mounting in proximity to the central portion of said tube a metallic member in the form of a sleeve surrounding said tube and in connecting said metallic member to one of the electrodes of said tube.

With the foregoing and other objects in View, which will appear in the following description, the invention resides in the novel combination and arrangement of parts and in the details of construction hereinafter described and claimed.

In the drawings illustrating an embodiment of my invention Fig. 1 is a longitudinal sectional view of 4o my improved lamp taken on line 1-1 of Fig. 2. y

Fig. 2 is a plan sectional view taken on line 2 2 of Fig. 1.

My invention consists primarily of a globe 10 of suitable transparent or translucent material such 4as glass or the like, which is formed with a short neck 11 extending outwardly from vthe same. Within this neck is disposed an arched partition 12 which is integrally connected tothe neck 11' at its juncture with .the globe 10. A cylindrical base 13 fits over the neck 11 and is formed with an end 14 best shown in Fig. 1. This base is cemented to the globe proper in the customary manner as will become presently apparent. Within the globe 10 is disposed a tubular member 15 which forms the illuminating element of the lamp. This tubular member is constructed of glass or any other suitable transparent or translucent material and is integrally connected to the partition 12 as indicated at 16 and 17 and is constructed with the extreme ends 18 and 19 thereof protruding slightly beyond the underside of said partition. In these ends v18 and 19 are arranged electrodes 20 and 21 which may be connected to a suitable source of electrical energy, as will be presently explained. The tube 15 is preferably arranged with a number of bends or convolutions 22 and 23 which increase the length of the same and correspondingly increase the candle power of the' lamp. The central portion of the tube 15 designated at 24, is preferably arranged in parallel relation with the partition 12 and is positioned relatively close thereto.

Within the interior of the base 13 is disposed a transformer 25 constructed with a core 26 and coils 27. The core 26 has c onnected to it and insulated therefrom four screws 28 and 29 to which are connected the high tension and low tension terminals, respectively, of the transformer coil 27. One of the screws 28 is connected to the electrode 21 so that upon impressing the electrical voltage across the screws 29 a current 'of high potential is impressed across the electrodes 21 of the tube 15. In the end wall 14 of base 13 is connected an ordinary electric plug 30 which comprises a threaded sleeve v31 and a flat contact 32 centrally disposed relative to said sleeve andheld in fixed position in the end of said sleeve by means of an insulating cap 33. The contact 32 is connected to one of the screws 29 while the `sleeve 31 is 95 connected to the other of said screws so that upon screwing the plug 30 into an ordinary electric light socket current will be sup lied to the low tension terminals of the trans ormer whereby the desired high voltage is im- 00 lillv pressed across the electrodes of the illuminating tube. The entire interior of the plug 30 and the base 13 are preferably filled with some insulating compound such as indicated at 34 which in addition to insulating the various portions of the transformer and terminals associated therewith also serves to hold the globe 10 attached to the base 13 and furthermore serves to hold thesaid transformer and parts immovable relative to one another.

Upon the portion 24 of the tube 22 is disposed a sleeve 35 constructed of thin metal which has connected to it a conductor 35 which passes through the partition 12 kand is connected to one or the other` of the two electrodes 20 or 21 of the illuminating tube 15. This sleeve serves as a condenser and has a peculiar effect upon the operation of the lamp in that it causes the lamp to function with a much lower voltage across the electrodes 20 and 21 than would otherwise be necessary were the said tube and condenser omitted. In this manner with a given transformer winding a greater length of illuminating tube may be employed so as to secure a greater candle power or with a given length of tube, a transformer of smaller ratio may be employed.

In the use of the lamp the same is screwed into the socket in the ordinary way without danger from the high voltage necessary to operate the illuminating tube. A much softer and pleasing light can be had with a lesser current consumption than with the ordinary incandescent lamp. B the substitution of different gases within tlie globe 10 and withi in the tube V15 different illuminating effects may be procured so that any desired result may readily be had. By means of the sleeve surrounding the tube and connected to one ofthe terminals the lamp is caused to positively illuminate at a much lower voltage than would otherwise be required.

Changes in the specific form of my invention, as herein disclosed, may be made within the scope of what is claimed without departin from the spirit of my invention.

aving described my invention, what I claim as new and desire to protect by Letters Patent is:

1. A lamp comprising a globe having a neck, a partition extending across said neck, a tube integrally connected at its ends to said partition and formed with electrodes at the lextending throughY said (plrtition at the portion thereof opposite sai In testimony whereof I have aixed my signature to this s ification.

ED ARD MCCLINTOCK. 

